High sensitivity metamaterial nano-sensing system with ultra-narrow line width spectral response

Abstract

The invention relates to a metamaterial nano-sensing system, and in particular to a high-sensitivity metamaterial nano-sensing system with an ultra-narrow line width spectral response. The system includes an input light path, a metamaterial nano-sensing unit and an output light path which are sequentially provided along a direction of a light path, and the metamaterial nano-sensing unit includes a Bragg grating and a metallic periodic array arranged above the Bragg grating. The nano-sensing system provided by the invention has an ultra-narrow line width spectral response, so that sensitivity of a nanosensor is effectively improved, and broad application prospect in the fields of portable biosensing, drug development and detection, environment monitoring and the like is ensured.

The invention claimed is: 
     
       1. A high-sensitivity metamaterial nano-sensing system with an ultra-narrow line width spectral response, comprising an input light path, metamaterial nano-sensing unit and output light path which are sequentially provided along a direction of a light path, wherein the metamaterial nano-sensing unit comprises a Bragg grating and a metallic periodic array arranged above the Bragg grating, wherein the Bragg grating is formed by dielectric layers which are made from two different materials and arranged sequentially and alternately. 
     
     
       2. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 1 , wherein the metallic periodic array is a sub-wavelength metallic periodic array. 
     
     
       3. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 2 , wherein the metallic periodic array is of a grating structure, a cylinder array structure or a cube array structure. 
     
     
       4. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 3 , wherein a metal in the metallic periodic array is a metallic material capable of exciting a surface plasmon and a Tamm excimer. 
     
     
       5. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 1 , wherein there is one or more metallic periodic arrays. 
     
     
       6. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 5 , wherein the input light path comprises a light source and a collimation equipment, and the collimation equipment is located between the light source and the metamaterial nano-sensing unit; and the output light path comprises a photoelectric detection equipment and a display equipment, and the photoelectric detection equipment is located between the metamaterial nano-sensing unit and the display equipment. 
     
     
       7. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 6 , wherein the light source is a continuous laser light source, a swept source, a white light source or another light source capable of exciting the surface plasmon and the Tamm excimer; and the photoelectric detection equipment is a spectrograph or other equipment with a spectral analysis function. 
     
     
       8. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 7 , wherein a substrate is arranged below the Bragg grating. 
     
     
       9. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 2 , wherein there is one or more metallic periodic arrays. 
     
     
       10. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 3 , wherein there is one or more metallic periodic arrays. 
     
     
       11. The high-sensitivity metamaterial nano-sensing system with the ultra-narrow line width spectral response according to  claim 4 , wherein there is one or more metallic periodic arrays.